Recent Cosmic Microwave Background (CMB) observations [1]} of temperature fluctuations agree well with the predictions made by inflation theory which states the universe was in a accelerated phase after the Planck era. According to the inflationary picture, not only primordial cosmological fluctuations (CMB temperature) have quantum origin, but they are also created in a quantum state. This quantum fluctuation provides an elegant description for the large scale structure advent of our universe which explain how the density perturbations which seeded structures in cosmos.
